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Madou, Mark
BIO-MEMS Lab
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  • Medical Diagnostics

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Improved graphitization and electrical conductivity of suspended carbon nanofibers derived from carbon nanotube/polyacrylonitrile composites by directed electrospinning

Cited 22 times inthomson ciCited 15 times inthomson ci
Title
Improved graphitization and electrical conductivity of suspended carbon nanofibers derived from carbon nanotube/polyacrylonitrile composites by directed electrospinning
Author
Maitra, TanmoySharma, SwatiSrivastava, AlokCho, Yoon-KyoungMadou, MarcSharma, Ashutosh
Keywords
Carbon sheets; Composite nanofibers; Electrical conductivity; Electrospun nanofibers; Fabrication technique; Orders of magnitude; Structural characterization; Templating effects; Weight fractions
Issue Date
201204
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.50, no.5, pp.1753 - 1761
Abstract
Single suspended carbon nanofibers on carbon micro-structures were fabricated by directed electrospinning and subsequent pyrolysis at 900 degrees C of carbon nanotube/polyacrylonitrile (CNT/PAN) composite material. The electrical conductivity of the nanofibers was measured at different weight fractions of CNTs. It was found that the conductivity increased almost two orders of magnitude upon adding 0.5 wt.% CNTs. The correlation between the extent of graphitization and electrical properties of the composite nanofiber was examined by various structural characterization techniques, and the presence of graphitic regions in pyrolyzed CNT/PAN nanofibers was observed that were not present in pure PAN-derived carbon. The influence of fabrication technique on the ordering of carbon sheets in electrospun nanofibers was examined and a templating effect by CNTs that leads to enhanced graphitization is suggested.
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DOI
http://dx.doi.org/10.1016/j.carbon.2011.12.021
ISSN
0008-6223
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